Frequencies for first 10,000 rows of contsub12 variable in nhamcsed2014 dataset :

      Controlled substance |
status code for medication |
                       #12 |      Freq.     Percent        Cum.
---------------------------+-----------------------------------
               Schedule II |          6        0.06        0.06
              Schedule III |          1        0.01        0.07
               Schedule IV |          2        0.02        0.09
                Schedule V |          1        0.01        0.10
                No control |        110        1.10        1.20
        Multiple schedules |          1        0.01        1.21
                         . |      9,879       98.79      100.00
---------------------------+-----------------------------------
                     Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017